Burner device for domestic furnaces



' imnieug STATES 'PATENT ,or-rice cAnL c. enterar., or rain. HAVEN, NEW .massif BURNER. nEvIcE ron DorrEsrIc rUnNacE's Application l111er! '.February23, 1929. Serial No. 341,927..`

rEhis invention relates-to burner devices for .l domestic furnaces and especially to domestic f furnaces which are equipped for oil heatlng with motor driven oil burners. l

the revision of a device of the character descri ed, which is efficient, economical and.v readily installed in conjunction with oil heating devices.

A more 'specific object of the invention 1s to provide an arrangement of cooperatlng burners desi ed to `carry particular portions of the heating and at the same time tointroduce ahigh factor of safety in operation ofthe heating device. y g

Other objects of the invention will. bein -prt obvious and will in part appear hereina er.

The invention'accordingly comprises the features of construction, combination of elements, and arrangement of parts, which will be exemplified in the construction hereinafter set forth and the scope of theapplication of which will .be indicated in the claims. For a fuller understanding of the nature .and objects of the invention reference should be had to the following detailed description taken in connection .with the accompanying drawings, in which: 4

Fig. 1 is a vertical transverse section of a boiler furnace of thedomestic variety constructed in accordance with the invention; Fig. 2 is a fragmentary horizontal section taken on the line 2 2 of Fig. 1'; and

Fig. 3 is-a sectional view showing details of one of the burner devices employed in accordance with the invention.

Referring now to the drawings and yparticularly to Fig. 1, 10 denotes a rlgid base on which a boiler furnace 11 is supported in the usual manner; the' base I0 resting on the c iioor or other support ofthe room.` or buildfing where the furnaceis installed. The/base v10 is constructed ordinarily vto provide an ash. pit such as is employed in conjunctlon with .coal-burningfurnaces. vThe base is 'accordinglv shown 'as havin Iformed about its upper inside edge a plurahty of ledges 12 and 13 between which are openings 14 adapted to receive the trunnions of grate bars. Above The invention-has for its object generally this arrangement are more readily seen in the usuallocation for the grate bars inthe boiler furnace is a space 15 which comprises the combustion vchamber for the boiler fur' nace. 1

The boiler furnace of the present invention 'is oil heated, consequently no grate bars are shown, and in the ash it is placed an oil burnin device A 16 whic is preferablyl operated y an electric motor 17 and is supplied with suitable hydrocarbon fuel from a suitable adjacently locatedreservoir (not shown in the interest of clearness) By the present invention, the heating efect of the burner 16 is supplemented b `meansof gas burners here shown lgenera y at 18. These gas burners are disposed adjacent the oil burner (preferably alongv each side of the ash pit an 'arranged ipo-project their iames inwardly to cooperate with that of the oil burner. These gas burners are arranged to supply a desired redetermined portion of the heatin load ofthe furnace which, when ascertaine is xed and the entire regulation of the heating effect is accomplished by re lating the oil burner.

o this end, the gasburner's are conveniently disposed as shown in Fig. 1 where the burner nozzles 1 8 are inserted in the o enings for the grate bar trunnions. Detai s of Fig. 3 where the burner tube 18 is disposed to fit substantially between the ledges 12 and 13 and arranged opposite to an opening 14 in the base 10. To supply such burner nozzle with gas, a jet tube 20 is arranged to extend through the opening 14 into the base of the burner nozzle 18 where it discharges gas at a relatively highvelocity so asl to pass into the nozzle'and'thenceto the combustion chamberl. The-jet tube 20 is arran ed to be supplied with gas from a'manifol 21 die osed outside ofthe base lO'horizontgillyad- )acent theopenin 1 4, so that each` burner, tube may be supp ied with gas from a'sub-v stantially constant head.

'As shown in Fig. 2,'a air of manifolds' 21 arev referably employe one at each side ofthe ase, these manifolds-being supported in turn`by branched connections 22 and 23 which lead froma supply main 24 leading 100 from any suitable source of gas sup ly. This main preferably has a as control valve as shown at interposed t erein.

The gas burners here employed as auxiliary s burners cooperating with the Oil burner, while generally of the 4Bunsen type, fi'e preferably of a variety adapted to burn relatively large volumes of gas and to effect quickly the proper admixture of air to form a combustible mixture. To this end, the jet tubes 2O are shown as having relatively large bores leading from the manifolds 21; each jet tube having at its outer end a reducing bushing 26 which causes the rapid issuance of a stream of gas that spreads itself cone-like. The burner tube 18, in order to permit this spread of asis enlarged\at its outer end as indicate at 27 in order to provide a mim'ng chamber of greater diameter than its inner end. In this way, an adequate supply of air is mixed with the gas prior to its passage through the burner tube 18 into the combustion chamber where it bursts into ame.

The air supply to the mim'ng chamber 27 of each gas burner is convenientl, regulated by means of a movable valve mem er secured on the jet tube 20. This is conveniently accomplished by roviding a -valve disk 28 which has threa ed engagement with the outside of the jet tube 20 whereby it is readily adjusted along the jet tube. The valve disk 28' when properly adjusted is arranged to be secured insuch adjustable osition by any suitable means, for example, y means cof the lock nut 29 shown jammed against the valve disk 28 in Fig. 3.

In operation, the burner tubes of the present invention are arranged so that the as burners take a predetermined lixed portlon of the load, while the oil burner 16 carries the remaining or variable portion of the load. For example, the gasburners may be adjusted to supply the heat units;- required by the heating system to compensate the average radiation, the oil burner in such case being arranged to carry the remalnder of the heating load. This is advantageous, since the oil burner is readily susceptible to temperature regulating b regulating the speed of the electric motor 1 consequentl a properl regulated heating effect may be obtamedY at all times from the system equipped with the presentY invention.

In case the electric power at any time goes off, it is seen that the oil burner alone stops functioning, and sinceV the system is now sup-l plied with heat-units through the burners 18 sufficient to take care of a predetermined amount lost by radiation, the house heated by cool below a desired point during the period that the oil burner is Y out' of commission, which is highly advantageous.

It is seen too that the burner devices of the U present invention may be very readily subthe means of the present invention does not.

remesa `ber adapted for oil burning may have cooperating gas burners installed adjacent thereto in accordance with the present invention.

Since certain changes may be made in the above construction and different embodiments of the invention could be made without departing from the scope thereof,it is intended that all matter contained -in the above description or shown in the accomanying dra-Wings shall be interpreted as ilustrative and not in a limiting sense.

Having described my invention, what l claim as new and desire to secure by Letters Patent is: l 1. In a domestic heating device of the character described having a combustion chamber, the combination with' a burner disposed in said chamber arranged to burn a mixture of air and hydrocarbonyfuel, of an electric motor to actuate said burner, and a plurality7 of gas burners disposed adjacenty to said first named burner arranged to Oheat the wall of said chamber and to supply .-chamber, and a manifold device arranged to supply gas to said burner ,tubes at a substantially constant head of pressure.

3. In a domestic heating device of the char-l acter described having a combustion chamber, the combination with a burner disposed in said chamber arranged to burn a mixture of air and hydrocarbon fuel, of an electric motor to actuate said burner, a plurality of burner tubes horizontall disposed about said firstnamed burner in t e base of said combustion chamber adjacent a wall of the same,

a jettube projectin ginto each of said burner n tubes adapted to e ect cone-like distribution. of the gas in said burner tubes, and a manifold device adapted to supply gas to said tubes at a substantially constant head of pressure.

4. In a domestic heating deviceof the character described having a combustion chamher, the combination with a burner disposed 380 in said chamber arranged to burn a mixture of airand hydrocarbon fuel, of an electric motor `to actuate said burner, a plurality of burner tubes horizontall disposed about said first named burner in the. base of said combustion chamber adjacent a Wall thereof, a,

jet tube projecting into each of said burner tubes adapted to effect cone-like distribution of the gas in said burner tubes, and an air regulating` means adjustable along said jet tubes arranged to control the air supply to said burner tubes.

5. In a furnace havinga combustion chamnber adapted'for the burning of coal, the'combination with a base having openin s for the reception of grate bar trunnions, o burner nozzles disposed in said base respectively opposite said grate bar openings, jet tubes projecting from said last named openings and adapted to supply gas to each of said nozzles, and means for supplying gas to said jet tubes at a substantially constant head of pressure.

said openings, and anl oil burning device disposed adjacent to said gas-burning means at the base of said combustion chamber.

In testimony'whereof I aiix'mv sigla-ture. i

CARL C.l SHIP testata 

